BestParts Titanium Professional Adjustable Optical Optic Eye Optometry Test Trial Lenses Frame, Ultra Light Optometry Optician Trial Lens

• ** Pupil distance adjustment range: binocular pupil distance range: 48 - 80 mm; left and right pupil distance: 24 - 40 mm each; the minimum scale value:1mm ; Adjustable length range of the left and right frame leg : 0~30mm.
• ** Axis scale: left scale: 130 °~ 0 °~ 120 °; right scale: 50 °~ 180 °~ 60 °. The axis scale increases anticlockwise along the axis of the frame, and the marking interval is 5°.
• ** Effective internal aperture of frame: Φ 33.5mm ; Adjustment range of nose pad: adjustable length: 0~25mm; angle: arbitrary angle.
• ** The number of lenses that can be inserted into the left and right frames: 5 (the front is 3 and the back is 2)，does not included in the package .
• ** Rotation degree of optical axis of lens in inner ring of frame: 360 °.

Product description Description: - Adjustable distance: Interpupillary distance of both eyes is 48 ~ 80 mm, the left and right interpupillary distance is 24 ~ 40 mm, the maximum scale is 1 mm and the adjustable range of single eye is 24 ~ 40 mm. - Adjustable pupil height: Through the pupil height adjustment knob on the test frame, it can be adjusted according to the pupil needs of different subjects. - Ultralight trial frame: 50g - Adjustable Optical Optic Trial Lens Frame: The length of the temples can be adjusted, the scale is accurate and the calculation is convenient. - Eye distance measurement: It has the function of inter-eye distance measurement ruler, and the distance from the innermost lens to the corneal vertex can be accurately calculated by testing the ruler on the frame.